Make DownloadHistory observe manager, items

content/public/browser/download_manager_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/file_path.h"
@@ skipping 79 matching lines @@
   // Allows the delegate to override opening the download. If this function
   // returns false, the delegate needs to call
   // DownloadItem::DelayedDownloadOpened when it's done with the item,
   // and is responsible for opening it.  This function is called
   // after the final rename, but before the download state is set to COMPLETED.
   virtual bool ShouldOpenDownload(DownloadItem* item);
 
   // Returns true if we need to generate a binary hash for downloads.
   virtual bool GenerateFileHash();
 
-  // Notifies the delegate that a new download item is created. The
-  // DownloadManager waits for the delegate to add information about this
-  // download to its persistent store. When the delegate is done, it calls
-  // DownloadManager::OnDownloadItemAddedToPersistentStore.
-  virtual void AddItemToPersistentStore(DownloadItem* item) {}
-
-  // Notifies the delegate that information about the given download has change,
-  // so that it can update its persistent store.
-  // Does not update |url|, |start_time|, |total_bytes|; uses |db_handle| only
-  // to select the row in the database table to update.
-  virtual void UpdateItemInPersistentStore(DownloadItem* item) {}
-
-  // Notifies the delegate that path for the download item has changed, so that
-  // it can update its persistent store.
-  virtual void UpdatePathForItemInPersistentStore(
-      DownloadItem* item,
-      const FilePath& new_path) {}
-
-  // Notifies the delegate that it should remove the download item from its
-  // persistent store.
-  virtual void RemoveItemFromPersistentStore(DownloadItem* item) {}
-
-  // Notifies the delegate to remove downloads from the given time range.
-  virtual void RemoveItemsFromPersistentStoreBetween(
-      base::Time remove_begin,
-      base::Time remove_end) {}
-
   // Retrieve the directories to save html pages and downloads to.
   virtual void GetSaveDir(BrowserContext* browser_context,
                           FilePath* website_save_dir,
                           FilePath* download_save_dir,
                           bool* skip_dir_check) {}
 
   // Asks the user for the path to save a page. The delegate calls the callback
   // to give the answer.
   virtual void ChooseSavePath(WebContents* web_contents,
                               const FilePath& suggested_path,
                               const FilePath::StringType& default_extension,
                               bool can_save_as_complete,
                               const SavePackagePathPickedCallback& callback) {
   }
 
  protected:
   virtual ~DownloadManagerDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_